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公开(公告)号：US06819260B2
公开(公告)日：2004-11-16
申请号：US10061921
申请日：2002-02-01
IPC分类号： G01V300
CPC分类号： E21B47/12 , G01V11/002
摘要： A synchronous CDMA telemetry system is provided for use in a wellbore. In one described embodiment, each data bit of digital outputs of multiple downhole data sources is multiplied by an orthogonal code unique to each data source. The resulting encoded outputs are modulated on a carrier frequency and summed on a transmission channel. The resulting signal is demodulated at a remote location and separately multiplied by each of the codes to separate out the contributions to the signal from each data source. The individual demodulated and decoded outputs are then integrated over the length of each data bit.
摘要翻译： 提供了用于井眼的同步CDMA遥测系统。 在一个描述的实施例中，多个井下数据源的数字输出的每个数据位乘以每个数据源唯一的正交码。 所得到的编码输出在载波频率上进行调制并在传输信道上相加。 所得到的信号在远程位置被解调并且分别乘以每个代码以分离出来自每个数据源的信号的贡献。 然后，单个解调和解码的输出在每个数据位的长度上被积分。
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12.发明授权High data rate acoustic telemetry system using multipulse block signaling with a minimum distance receiver 有权使用具有最小距离接收器的多脉冲块信令的高数据速率声学遥测系统公开(公告)号：US06583729B1
公开(公告)日：2003-06-24
申请号：US09507610
申请日：2000-02-21
申请人： Wallace R. Gardner , Vimal V. Shah , Donald Kyle
发明人： Wallace R. Gardner , Vimal V. Shah , Donald Kyle
IPC分类号： G01V300
CPC分类号： G01V11/002
摘要： A reliable downhole acoustic telemetry system with increased data rate is disclosed. In one embodiment, the telemetry system includes a receiver having an envelope-detection demodulator and a multipulse-block distance detector that compares a baseband envelope signal to stored waveforms and indicates for each symbol interval the multipulse block having the waveform closest to the baseband envelope signal. The receiver may also include a timing recovery module that models the baseband envelope signal for the detected multipulse blocks and determines a distance for early-sampling and late-sampling of the baseband envelope signal. The timing recovery module then provides a sampling clock that minimizes the average difference between the early- and late-sampling distances. The telemetry system may further include a transmitter having an encoder and a modulator. The encoder converts a data signal into a sequence of multipulse blocks having a settling interval between the blocks. The modulator modulates the multipulse block sequence with a carrier frequency to produce an amplitude modulated signal. The telemetry system may have the transmitter and receiver coupled to a tubing string by an acoustic signal generator and an acoustic transducer, respectively. The acoustic signal generator converts the amplitude modulated signal into acoustic waves that propagate along the tubing string to the acoustic transducer, which then converts the acoustic waves into a receive signal. The system and method disclosed may advantageously provide a robust, low-power telemetry system that communicates telemetry along a tubing string at a rate that is at least an order of magnitude greater than existing acoustic telemetry methods.
摘要翻译： 公开了一种具有增加的数据速率的可靠的井下声学遥测系统。 在一个实施例中，遥测系统包括具有包络检测解调器和多脉冲块距离检测器的接收机，其将基带包络信号与存储的波形进行比较，并且针对每个符号间隔指示具有最接近基带包络信号的波形的多脉冲块 。 接收机还可以包括定时恢复模块，其对所检测到的多脉冲块进行基带包络信号的建模，并确定基带包络信号的早期采样和后采样的距离。 定时恢复模块然后提供采样时钟，其使得早期和晚期采样距离之间的平均差异最小化。 遥测系统还可以包括具有编码器和调制器的发射机。 编码器将数据信号转换为在块之间具有建立间隔的多脉冲块序列。 调制器用载波频率调制多脉冲块序列以产生幅度调制信号。 遥测系统可以分别通过声信号发生器和声换能器将发射器和接收器耦合到油管柱。 声信号发生器将幅度调制信号转换成沿着管柱传播到声换能器的声波，声换能器然后将声波转换成接收信号。 所公开的系统和方法可以有利地提供鲁棒的低功率遥测系统，其以比现有的声学遥测方法大至少一个数量级的速率沿油管柱传送遥测。
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公开(公告)号：US5365229A
公开(公告)日：1994-11-15
申请号：US216504
申请日：1994-03-22
摘要： The operation of hostile environment logging tools at temperatures up to 250.degree. C. stresses not only the tools, it also places severe demands upon the wireline telemetry due to the wide variations in the logging cable transmission characteristics. A robust adaptive wireline telemetry system for use in hostile environments has been developed that combines sophisticated digital communication methods with modern Digital-Signal-Processing (DSP) techniques. The downhole telemetry transmitter outputs a multilevel signal. The uphole receiver includes an adaptive transversal-filter equalizer (TFE) that is continually optimized to correct for changing signal distortion. The system operates robustly at high data rates over the temperature range of 0.degree. to 250.degree. C.
摘要翻译： 敌对环境测井工具在高达250°C的温度下的操作不仅强调了工具，而且由于测井电缆传输特性的广泛变化，它也对有线遥测提出了严格的要求。 已经开发出一种用于敌对环境的强大的自适应有线遥测系统，其将复杂的数字通信方法与现代数字信号处理（DSP）技术相结合。 井下遥测发射机输出多电平信号。 井上接收机包括一个自适应横向滤波均衡器（TFE），其被不断地优化以校正变化的信号失真。 该系统在0°至250°C的温度范围内，以高数据速率运行稳定。
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公开(公告)号：US08193946B2
公开(公告)日：2012-06-05
申请号：US12065529
申请日：2006-11-10
IPC分类号： H04H9/00
CPC分类号： E21B47/16
摘要： Acoustic telemetry devices and methods that provide directional detection. In one embodiment, a disclosed acoustic telemetry device comprises at least two acoustic sensors and an electronics module. The electronics module combines the detection signals from the acoustic sensors to obtain a combined signal that substantially excludes signals propagating in a direction opposite to the communication signal. The disclosed systems and methods can be trained in the field and will readily accommodate an irregular and unknown signal transmission medium between the two acoustic sensors.
摘要翻译： 声学遥测装置和方法提供方向检测。 在一个实施例中，公开的声学遥测装置包括至少两个声学传感器和电子模块。 电子模块组合来自声学传感器的检测信号，以获得基本上排除在与通信信号相反的方向传播的信号的组合信号。 所公开的系统和方法可以在现场进行训练，并且将容易地适应两个声学传感器之间的不规则和未知的信号传输介质。
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公开(公告)号：US08040249B2
公开(公告)日：2011-10-18
申请号：US12857664
申请日：2010-08-17
IPC分类号： G01V3/00
CPC分类号： G01V11/002 , E21B47/16
摘要： One embodiment includes an apparatus that includes a piezoelectric transducer to generate an acoustic signal that is to modulate along a mandrel, wherein the piezoelectric transducer includes at least one piezoelectric element and at least one electrode that is without non-permanent joints.
摘要翻译： 一个实施例包括一种装置，其包括压电换能器以产生将沿心轴进行调制的声学信号，其中压电换能器包括至少一个压电元件和至少一个没有非永久性接头的电极。
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公开(公告)号：US20100309019A1
公开(公告)日：2010-12-09
申请号：US12857664
申请日：2010-08-17
IPC分类号： G01V3/00
CPC分类号： G01V11/002 , E21B47/16
摘要： One embodiment includes an apparatus that includes a piezoelectric transducer to generate an acoustic signal that is to modulate along a mandrel, wherein the piezoelectric transducer includes at least one piezoelectric element and at least one electrode that is without non-permanent joints.
摘要翻译： 一个实施例包括一种装置，其包括压电换能器以产生将沿心轴进行调制的声学信号，其中压电换能器包括至少一个压电元件和至少一个没有非永久性接头的电极。
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17.发明授权Downhole telemetry system having discrete multi-tone modulation with QAM fallback 有权具有QAM回退的离散多音调制的井下遥测系统公开(公告)号：US07443312B2
公开(公告)日：2008-10-28
申请号：US10863131
申请日：2004-06-08
IPC分类号： G01V3/00
CPC分类号： H04L27/0008 , E21B47/12 , G01V11/002 , H04L1/0003 , H04L25/0202 , H04L25/03006 , H04L27/2601
摘要： Improved communication systems and methods are disclosed. In one embodiment, a downhole communications system comprises a downhole transceiver and a surface transceiver. The surface transceiver receives a discrete multi-tone (DMT) modulated uplink signal from the downhole transceiver, and transmits a downlink signal to the downhole transceiver using a modulation method determined by the transceivers as communications are initiated. The downlink modulation methods supported by the surface transceiver may include DMT modulation and quadrature amplitude modulation (QAM). The modulation mode selection may be based on measured channel characteristics, on proposed data rates, or on other predetermined parameters. The uplink and downlink signals may be communicated over a shared transmission mode on multiconductor cable or wired pipe, and alternatively the uplink and downlink signals may be communicated over separate transmission modes.
摘要翻译： 公开了改进的通信系统和方法。 在一个实施例中，井下通信系统包括井下收发器和表面收发器。 表面收发器从井下收发器接收离散的多音调（DMT）调制上行链路信号，并在通信发起时，使用由收发器确定的调制方法将下行链路信号发送到井下收发信机。 由表面收发器支持的下行链路调制方法可以包括DMT调制和正交幅度调制（QAM）。 调制模式选择可以基于测量的信道特性，所提出的数据速率或其他预定参数。 上行链路和下行链路信号可以在多导体电缆或有线管道上通过共享传输模式进行通信，并且可替代地，上行链路和下行链路信号可以通过分开的传输模式进行通信。
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公开(公告)号：US20080219097A1
公开(公告)日：2008-09-11
申请号：US12041421
申请日：2008-03-03
IPC分类号： E21B47/16
CPC分类号： G01V11/002 , E21B47/16
摘要： One embodiment includes an apparatus that includes a piezoelectric transducer to generate an acoustic signal that is to modulate along a mandrel, wherein the piezoelectric transducer includes at least one piezoelectric element and at least one electrode that is without non-permanent joints.
摘要翻译： 一个实施例包括一种装置，其包括压电换能器以产生将沿心轴进行调制的声学信号，其中压电换能器包括至少一个压电元件和至少一个没有非永久性接头的电极。
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19.发明授权Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation 有权使用多个上行链路模式的井下遥测系统作为使用离散多音调制的数据信道公开(公告)号：US07132958B2
公开(公告)日：2006-11-07
申请号：US10424475
申请日：2003-04-28
申请人： Carl Dodge , Wallace R. Gardner
发明人： Carl Dodge , Wallace R. Gardner
CPC分类号： E21B47/12 , G01V11/002
摘要： A method and a downhole telemetry system a downhole telemetry system using discrete multitone modulation for transmitting a data stream over a plurality of transmission modes is provided. The downhole telemetry system includes a downhole transmitter, a cable, and a surface receiver. The downhole transmitter is configured to transmit the data stream over the plurality of transmission modes. The surface receiver is coupled to the downhole transmitter via the cable and is configured to combine signals from each of the plurality of transmission modes to obtain the data stream transmitted by the downhole receiver. The method includes receiving a plurality of signals over the plurality of transmission modes from a downhole package, and may further include combining the plurality of signals to form at least one data stream.
摘要翻译： 一种方法和井下遥测系统，提供一种使用离散多音调制的井下遥测系统，用于通过多种传输模式传输数据流。 井底遥测系统包括井下发射器，电缆和表面接收器。 井下发射器被配置为通过多个传输模式发送数据流。 表面接收器经由电缆耦合到井下发射机，并且被配置为组合来自多个传输模式中的每一个的信号以获得由井下接收器发送的数据流。 该方法包括从井下包装在多个传输模式上接收多个信号，并且还可以包括组合多个信号以形成至少一个数据流。
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公开(公告)号：US07042367B2
公开(公告)日：2006-05-09
申请号：US10067126
申请日：2002-02-04
IPC分类号： G01V1/00
摘要： A very high data rate telemetry system is provided for use in a wellbore. In a described embodiment, a telemetry system includes multiple nodes positioned in the wellbore and distributed over a substantial length of the wellbore. The nodes simultaneously communicate with a remote location at a very high combined data transmission rate. A method of communicating data in a wellbore is also provided. The method includes the steps of installing multiple modems in the wellbore, installing a remote modem at a location remote from the downhole modems, and simultaneously communicating data from each of the downhole modems to the remote location. Each downhole modem communicates with the remote modem using a unique set of frequency subchannels.
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